Virtue is the only true good, and vice the only true evil. Act in a way that aligns with virtue, not seeking rewards or avoiding punishments, but for the sake of virtue itself.
Change is the only constant in life. Acceptance of change leads to inner peace. When faced with change, take a deep breath and remind yourself that this too shall pass.
What will be, will be. Focus on what you can control and accept the rest with equanimity. Reflect on the things you cannot change and find peace in their inevitability.